Re: List of open-source PC hardware projects

Posted on 2023-05-09, 14:20

by

by RayeR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Uh, [headbanging on the table :], why we didn't know this a bit sooner. I have more EDO SIMMs and didn't need hunting for FPM ones, so I could make my SIMM PCB adapted for EDO chips. OK, let there be 3rd revision :P Maybe I could try to make it optional via 0R jumpers to configure for both FPM and …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-04-24, 17:43

by

by RayeR

in Marvin \ System Specs

in Marvin \ System Specs

Also check pull-up resistor, I think there should be one at I2C data cca 4k7.... on I2C clock there's internal pull up in crystal chip..

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-04-24, 16:51

by

by RayeR

in Marvin \ System Specs

in Marvin \ System Specs

Did you tried this ? "Force CONTROL Logical Device Address" - ALT+A

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-04-22, 13:29

by

by RayeR

in Marvin \ System Specs

in Marvin \ System Specs

2 of the USB ports go straight to the CH559 chip which runs rasteri's "HIDman" firmware which translates USB HID devices into keyboard and mouse PS/2 signals. This works way better than letting SeaBIOS do the PS/2 emulation. Aha, I didn't get a CH559 yet... How the FW is programmed in? From vortex …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-04-22, 00:10

by

by RayeR

in Marvin \ System Specs

in Marvin \ System Specs

Aha, ok, then let user decide if this function worth to sacrifice another functionality. Btw where is PS/2 used od TinyLama? I'm assembling PCB v2.1 and it has only 4 USB, not PS/2...

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-04-21, 23:55

by

by RayeR

in Marvin \ System Specs

in Marvin \ System Specs

It could be possible to modify coreboot/seabios int13h handler that way when entered the handler use a GPIO to light on the LED and ligt it off just before IRET.

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Re: Geforce 7 series backwards compatibility

Posted on 2023-04-20, 22:21

by

by RayeR

in Marvin \ Video

in Marvin \ Video

I though we are talking about refresh rate setting under pure dos, not ntvdm. When Windows are active, then nvidia driver can do various settings on the card so it may then support refresh settings some way/altered by driver. But I wonder if any 7xxx card can set refresh under pure dos...

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-04-18, 20:18

by

by RayeR

in Release Announcements

in Release Announcements

What superIO do you have? Most of them already contains two PS/2 ports. Your MB has any PS/2 on backpanel? My GB has only one. Some smarter manufacturers route both PS/2 to single miniDIN connector allows use Y-cable to split for both KB+mouse. But not GB, they was just too lazy to route 2 wires out …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-04-16, 13:53

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

Original sb live/audigy drivers used sound font files shared with windows drivers to emulate wavetable under dos, should be doable. I would be also happy enough with sending midi data to uart on gameport to feed my ext. dreamblaster...

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-04-16, 13:26

by

by RayeR

in Release Announcements

in Release Announcements

I was thinking about charge pump too but it has quite big vout ripple, not a problem for digital circuits but not good for analog, so maybe a -12v switched supply and -5v LDO would be better... 3.3v can be also easily generated by LDO from 5V, I think the bridge would not need much current from 3v3 …

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-04-12, 16:28

by

by RayeR

in Release Announcements

in Release Announcements

BTW I was able to milling off the copper trace jumper on my TPM pin 20 and then hooked a wire to LDRQ1# from PCH, so my MB Gigabyte GA-P67A-D3-B3 is ready for testing. I plan to send some batch to JLC...

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-04-12, 16:22

by

by RayeR

in Release Announcements

in Release Announcements

Could we combine a pigus with this in 1 board? that would be cool 😁 Anything ISA-based can be combined at one PCB but It doesn't make much sense to me as I rather have it modular and use the ISA slot for soundcard that I choose and can easily swap it by another. I would rather combine it with 2nd …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-04-12, 16:17

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

What is meant to be "HX compatible SB emulation" ? That it will not require modified hdpmi32i but only std hdpmi32 from your repo?

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-04-12, 12:17

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

This is opensource (fork, fork, fork as possible 😀 bwt I can understand both approaches presented here and cannot surely decide what's better.

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-04-10, 04:04

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

Any ideas about this behaviour? Cubic Player / Open Cubic Player - music plays ok, but the screen is jumping like crazy (all modes) :) I quickly patched 1 byte (LF to CR) in hdpmi32i.exe so the message didn't disappear but it's not jumping anymore, just printed at top line, so not much disturbing. …

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Re: Cs4235 to cs4237b transplant possible?

Posted on 2023-04-10, 00:45

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

Oh, this really had not chance to work... If you want to add external I2C EEPROM (if not on the board), you just need to hook wires at pins: 14 - SCL - connect to pin 6 at EEPROM 8 - SDA - connect to pin 5 at EEPROM A0, 1, 2 (pins 1,2,3) and WP (pin 7) at EEPROM connected to GND SDA also needs pull- …

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Re: Cs4235 to cs4237b transplant possible?

Posted on 2023-04-09, 23:37

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

How/where did you add that ASM file into computers bios? It doesn't makes any sense, you just break some BIOS checksum so it doesn't boot. The ASM file is just a text representation of sound chip configuration data and computer bios doesn't know about it/how to hadle it. The config data makes sense …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-04-09, 00:51

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

Any ideas about this behaviour? Cubic Player / Open Cubic Player - music plays ok, but the screen is jumping like crazy (all modes) :) I got the same behavior, sound plays OK. At bottom of screen there are printed a bunch of messages: trapcli pushf pop ax 0202 0202 isn't it some forgotten …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-04-07, 12:51

by

by RayeR

in Marvin \ Sound

in Marvin \ Sound

crazii wrote on 2023-04-07, 08:38: But there're some few games that hate running on a USB disk. It maybe rather that enabling USB legacy support on some systems cause unspecified errors/hangs/crashes so I avoid it by using PS/2 kbd and mouse and booting from HDD...

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Re: dISAppointment - LPC to ISA adapter - ISA on modern motherboards

Posted on 2023-04-07, 12:44

by

by RayeR

in Release Announcements

in Release Announcements

There's still legacy DMA and PIC somewhere inside chipset and you can probaly tune some timing in registers but LPC is not much faster than old ISA, clock is 33MHz but it's serialized...

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